Prep frame and paint. Fitting Erson rocker arm assemblies to Edelbrock heads with ARP stud kits. The studs hit the bottom of the rocker stands. Call to Erson and they say to grind as necessary. They are aware of problem but previous owner (Mr. Gasket) wouldn’t spend money to correct product applications. I really love the mentally of some companies – and they wonder why they continue to lose sales.